I´m running Basilisk II on various Windows 10 rigs occasionally - never encountered the error you posted.Are you 100% sure, you have the correct SDL and GTK packages?Best double check the setup guide: https://www.emaculation.com/doku.php/basilisk_ii

To run Basilisk II, the setup GUI is not essential.Yo may also create a Basilisk II prefs file manually.Maybe try Basilisk II Build 142 too, as the version does not need the GTK framework.BII Build 142 asks for the CDROM driver at startup, just close that requester and the emulator should start.The CDROM driver does not work on 64bit systems anyways.